Questions tagged [gpws]

The Ground Proximity Warning System (GPWS) warns flight crew if the aircraft is in immediate danger of flying into terrain or an obstacle. The first generation of these systems was developed in the 1970s to reduce the number of controlled flight into terrain (CFIT) accidents. At the end of the 20th century, a newer generation of systems became available, called Enhanced Ground Proximity Warning System (EGPWS).

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4
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1answer
427 views

What's the difference between the “100 above” and “100” GPWS above callout?

Not all aircraft have both; this one does and can be heard at 1:12:
3
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1answer
319 views

Can 737NG GPWS and other warning voice lines/sounds be played in headphones instead of cockpit speaker?

I watched a couple of cockpit videos on the 737NG landing, and I noticed GPWS in some of the videos does not announce 500ft, 400ft, 300ft, etc. Does this mean the pilots have routed these sounds into ...
0
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1answer
287 views

Why does an ADIRU 1 failure disable all functions of the A330/340’s GPWS - even those not requiring ADIRU data?

Among the many (many many) aircraft systems degraded or rendered unavailable to the flightcrew of QF72 as a result of a partial intermittent ADIRU 1 (Air Data / Inertial Reference Unit 1) failure, the ...
3
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1answer
294 views

Does the Ground Proximity Warning System (GPWS) see through clouds?

Or can it only detect terrain on a clear day or night? I’m mostly asking because of PIA268 I know GPWS is much more reliable in todays time, and I’m unsure if the accident flight even had a GPWS ...
3
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0answers
147 views

What flight conditions trigger the “altitude, altitude” callout on an A-10?

I saw this video that shows an A-10 mission in Afghanistan. At 4:31 and 6:08 the callout "Altitude, altitude" is audible. I would like to know which flight conditions are required to trigger the ...
3
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2answers
633 views

Does the Boeing 737 NG have “5” radar altitude callout?

So, I was watching a video of a Boeing 737 NG land, and heard the "5" callout. Is that an airline option or something? EDIT : link to video
2
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2answers
271 views

Why do we have to check the speed brakes during GPWS memory items on an A320?

Just out of curiosity, I want to ask why do we have to check that the speed brakes lever is retracted during a GPWS (Ground Proximity Warning System) maneuver using the A320 memory items? It clearly ...
1
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0answers
66 views

737 ACP GPWS volume control?

So, I was sitting in the front rows of an A320 and could obviously hear the AP disconnect. But I could not hear the GPWS altitude and RETARD callouts. I assume this is because the pilots set the GPWS ...
0
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1answer
564 views

How to disable GPWS in a 737NG just like how the Airbus can?

The Airbus planes have a feature where the GPWS can be disabled. But I cannot find any switch in the 737NG cockpit to disable the GPWS.
8
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1answer
1k views

Are the GPWS callouts recorded with real people or computer generated?

I absolutely love the tone of the GPWS callouts in the Boeing 737NG, and I was wondering whether the callouts where computer generated or a recording of a brilliant voice actor.
1
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4answers
252 views

Do any gliders carry GPWS?

Do any gliders come with a ground proximity warning system (GPWS)? I realise that, for a glider, a GPWS probably wouldn't be able to help quite as much as in a powered aircraft, since a glider, by ...
5
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1answer
333 views

Did Hamilton Sundstrand Corporation fix this GPWS problem?

So I was reading about Garuda Indonesia Flight 152 and one of the reason it crashed was for a GPWS malfunction. Here is the Wikipedia article about the crash and GPWS: Garuda Indonesia Flight 152 ...
13
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1answer
1k views

Why are there non-standard altitude callouts?

I just saw a YouTube video with an A340 landing. There were the regular altitude callouts (1000, 500, etc.) until the callout "110". I was quite puzzled by this. What are the conditions that the ...
1
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1answer
1k views

What does the callout “300… MINIMUMS” mean? [duplicate]

MINIMUMS.... 400 APPROACHING MINIMUMS... 300 MINIMUMS. Is this a reference to gravity? Needing more speed? Or the minimums you can see to the lights on your approach to land? I looked this ...
9
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2answers
1k views

Does autopilot disconnect when a danger alarm like GPWS triggers?

I was wondering if any of the (E)GPWS callouts would make the autopilot disconnect? If the Alpha Protection is active (like in Bilbao, 2014) would it disconnect? That would give PF full control of ...